This is a well put together 3D jigsaw puzzle. The pieces are plastic and lock together well, with none of the fraying sometimes seen with card pieces. Each piece is numbered for an `easy' construction, but you can do it the difficult way, finding the piece for each hole if you prefer. That's the way I did it, it took about 16 hours to complete and was as enjoyable as any jigsaw.
There is a nice display stand included, and the finished article of the antique map makes a very nice ornament.
The map itself has a few interesting flourishes, notably the voyages of Drake and Magellan are marked out. The construction was quite educational, geography has never been my strong point but I learnt quite a bit about it whilst trying to work out which piece goes where! Also, I had not realised that so much of the earth's surface is featureless ocean...
There was no trouble with missing pieces, and the visual aid to help construction is a neat and well thought through idea.
An excellent set all round, highly recommended.